◎ 题干
---What were you doing when the UFO ______?
---I ______ a milk shake.
A.reached, madeB.reached, was makingC.arrived, madeD.arrived, was making
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“---What were you doing when the UFO ______? ---I ______ a milk shake.A.reached, madeB.reached, was makingC.arrived, madeD.arrived, was making…”主要考查了你对  【一般现在时】【过去进行时】【过去完成进行时】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。